buildx: split module

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

src/toolkit.ts

@@ -15,19 +15,21 @@
  */
 
 import {Context} from './context';
-import {Buildx} from './buildx';
+import {Buildx} from './buildx/buildx';
 import {BuildKit} from './buildkit';
 import {GitHub} from './github';
 
-export {Builder, BuilderOpts, BuilderInfo, NodeInfo} from './builder';
+export {Builder, BuilderOpts} from './buildx/builder';
 export {BuildKit, BuildKitOpts} from './buildkit';
-export {Buildx, BuildxOpts} from './buildx';
+export {Buildx, BuildxOpts} from './buildx/buildx';
 export {Context} from './context';
 export {Docker} from './docker';
 export {Git} from './git';
 export {GitHub, GitHubRepo, GitHubActionsRuntimeToken} from './github';
 export {Util} from './util';
 
+export {BuilderInfo, NodeInfo} from './types/builder';
+
 export interface ToolkitOpts {
   /**
    * GitHub token to use for authentication.